Triple

Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).

Phrase: Congress of Gniezno | Statement: [Piast dynasty, significantEvent, Congress of Gniezno]

Target entity: Congress of Gniezno
Context triple: [Piast dynasty, significantEvent, Congress of Gniezno]

• A. Union of Brest
  The Union of Brest was a 1596 religious agreement that brought several Eastern Orthodox dioceses of the Polish–Lithuanian Commonwealth into communion with the Roman Catholic Church while allowing them to retain the Byzantine rite.
• B. Visegrád Four
  Visegrád Four is a political and economic alliance of four Central European countries—Czech Republic, Hungary, Poland, and Slovakia—cooperating on regional issues and European integration.
• C. Peace of Constance
  The Peace of Constance was a 1183 agreement that ended the conflict between Holy Roman Emperor Frederick I Barbarossa and the Lombard League by recognizing the autonomy of the Italian communes while preserving imperial overlordship.
• D. Concordat of Worms
  The Concordat of Worms was a 1122 agreement between the Holy Roman Emperor and the papacy that ended the Investiture Controversy by distinguishing between the spiritual and temporal powers in the appointment of bishops.
• E. Lutsk Conference of 1429 (Congress of Monarchs)
  The Lutsk Conference of 1429, also known as the Congress of Monarchs, was a major diplomatic summit in Eastern Europe where leading rulers of the region gathered to negotiate political alliances, territorial disputes, and strategies against the Ottoman threat.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"

Entity: Congress of Gniezno
Triple: [Piast dynasty, significantEvent, Congress of Gniezno]

The Congress of Gniezno was a landmark 1000 AD meeting between Polish ruler Bolesław I and Holy Roman Emperor Otto III that affirmed the status of the early Polish state and established an independent Polish church hierarchy.

Target entity: Congress of Gniezno
Target entity description: The Congress of Gniezno was a landmark 1000 AD meeting between Polish ruler Bolesław I and Holy Roman Emperor Otto III that affirmed the status of the early Polish state and established an independent Polish church hierarchy.

• A. Union of Brest
  The Union of Brest was a 1596 religious agreement that brought several Eastern Orthodox dioceses of the Polish–Lithuanian Commonwealth into communion with the Roman Catholic Church while allowing them to retain the Byzantine rite.
• B. Visegrád Four
  Visegrád Four is a political and economic alliance of four Central European countries—Czech Republic, Hungary, Poland, and Slovakia—cooperating on regional issues and European integration.
• C. Peace of Constance
  The Peace of Constance was a 1183 agreement that ended the conflict between Holy Roman Emperor Frederick I Barbarossa and the Lombard League by recognizing the autonomy of the Italian communes while preserving imperial overlordship.
• D. Concordat of Worms
  The Concordat of Worms was a 1122 agreement between the Holy Roman Emperor and the papacy that ended the Investiture Controversy by distinguishing between the spiritual and temporal powers in the appointment of bishops.
• E. Lutsk Conference of 1429 (Congress of Monarchs)
  The Lutsk Conference of 1429, also known as the Congress of Monarchs, was a major diplomatic summit in Eastern Europe where leading rulers of the region gathered to negotiate political alliances, territorial disputes, and strategies against the Ottoman threat.
• F. None of above. chosen